Improvement in windlasses



uitrit tapes stnt @fitta RICHARD H. EMERSON, OF FOND DU LAC, WISCONSIN.

Laim Patent No. 64,005, daad April 23, 1867;

IMPROVEMENT IN WINDLASSES.

TO ALL WHOM LT MAY CONCERN:

Be it known that I, RICHARD H. EMERSON, of Fdnd du Lac, in the State ofWisconsin, have invented a new and useful Improvement in Windlasss. Theobject of my invention is to aii'ord a windlass possessing great liftingpower, and, by the arrangement of the pulleys, to enable the operator tostop the weight when desired, and also to secure an uninterrupteddischarge of the slack; and I do hereby declare that the following is a.full, clear, and exact description of the construction and operation ofthe same, reference being had. to the annexed drawings, making a part ofthis specification, in which- Figure 1 is a perspective view.

Figure 2, am end section and Figure 3,51. cross-section.

ai represents the power shaft, having firmly fixed upon it the smallcogwheel b. c, a drum-pulley upon the shaft a, working freely thereon.d, a. large cog-wheel fast on the shaft e. f, a drum-pulley, securedfirmly upon the shaft e, and made smaller than the drum-pulley c, forthe purpose of obtaining a larger friction surface upouits face. g g aregrooved pulleys, swung, as represented in the drawings, upon thespring-bar. z g. are

i levers, held by proper fastenings in the upper cross-brace of themachine, the former being eccentric in its action, and the latteroperating as aycant. 'L' is a springbar, upon which are swung thepulleys g g. The bar is held securely by the bolt or rivet 7c extendingthrough it and the upper cross-brace. By the pressure of theeccentric-lever h upon the rope the weight may be stayed at any positiondesired; and by the pressure of the cant-lever k the slack may beregulated to suit the operator. This lever may be retained in thedesired position by the strap or rope Z, made fast to the leg of themachine. Atm is an elastic inserted, intended to obviate any diiicultyarising from any unevenness in the rope. nis a pulley upon the shaft a,independent of the drum-pulley c, and working freely upon the shaft. Itsobject isto convey the rope from the object to the pulley f; and` thereason why it is'made independent of the pulley c is thatthedrum-pulleybeing made smaller than the drum-pulley c, it consequentlymoves with a diiTerent velocity; but by means of the pulley n anequality of motion is obtained, and the machine saved from any strainwhich might occur if otherwise arranged. The frame of the machine isconstructed as showin in the drawings, andthe bearings of the shafts arein the side pieces of the frame. lThe machine may be set either uprightor lateral, according to the power applied..

I Whatlclaim as my improvement, and desire to secure by Letters Patent,is-` A Windlass, having shaft a, wheel b, drum-pulley c, wheel d,drum-pulleyf, pulleys g g, elastic m,.spring bar levers t k', arranged,combined, constructed, and operating substantially as described.

RICHARD H. EMERSON.

Witnesses:

A. G. HEYBRUNN, FRANcrs A.. GrBBoNs.

